Funding for this research was provided by:
Norges Forskningsråd (269855)
Text and Data Mining valid from 2020-03-12
Received: 30 August 2019
Accepted: 3 March 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: The Regional Committee for Medical and Health Research Ethics (REC), REC West, Norway, has approved the use of registry data for the study (reference number 2018/939/REK Vest, June 19, 2018). The REC committee is appointed by the Norwegian Ministry of Education and Research. No informed consent from the patients was necessary.
: Not applicable
: I.O. is employed at the Centre for Pharmacoepidemiology, Karolinska Institutet, which receives grants from several entities (pharmaceutical companies, regulatory authorities, and contract research organizations) for performance of drug safety and drug utilization studies, unrelated to this work.